Non-scalding valve.



P. HOPFMANN.

NON-SGALDING VALVE APPLICATION rILnn mm: s, 1909.

982,498. Patnted Jan. 24, 1911.

UNIT ED sTaTEsPATEnT oFFioE.

FRED norrmelvuv, or MILWAUKEE, Wisconsin, assienoa T0 HQFFMANN & BILLINGS. MANUFACTURING oomranr, or MILWAUKEE, ,w rsconsm n CORPORATION on WISCONSIN Non soALDIisIefIvArrive."-

Specifieationof letter Pat Patented J an. 24, 1911.

v Application filed June 5, 1909 Seria1N0.'500,376; it

' wa'ukee and State of Wisconsin, have invent-- Sf'ed new and useful Improvements in Non- 1 Scalding Valves, of which the following is a description, reference being bad to the accompanyingdrawings, which are a part of this specification.

This invention has for its object to provide a mixing valve for showers and the like which will be provided with an adjustable stop. for limiting the degree of opening of the valve to. a position where the proportion '15 of hot water to the cold water admitted will 'be the maximum desired and at the same time will be such that there will berno danger of scalding. J

' Another object of the invention is to provide for'operating the hot and coldwater supply valves bymeans of eccentrics on the stem of the regulating handle, the valves being so arranged that a free flow of cold water is first effected and then an inoi easing flow of hot water with a reduction in the I I flow of cold water so as to raise the temperature of the mixture flowing to the shower.

Another object of this invention is to provide for the adjustment of the hot and cold water supply valves to compensate for wear.

'-With the above-and other objects in view.

5 the plane of line/1 t of Fig. 3.

in these drawings, 10 indicates a valve casing to the ends of which unions 11 connect anelbow coupling 12 of a cold water 1 supply pipe and an elbow coupling 13 of a e etv ris pp y p p each d co plings:

avin za union 14 forfcohnection withf said supply pipes, not shown; The. ends of the valve casing 10 form valve seats for the re-[ spective cold water and hot water supply.

valves which comprise recessed valve members 15' threaded on valve stems 16 with rubber gaskets 17 having metal backings 18 also mounted on the valve stem and held tightly against said valve members by means of cap 'nuts'1'9'threaded on the ends of the valve stems' The valves are of the same construction, but the valve member 15 of.- the cold water supply valve has its recess open at the end next to the rubber gasket 17 while the .valve member 15 of the hot water supply valve has its recess open at the inner end of'the valve, and itsplane disk-like unrecessed portion against the rubber gasket 17.

The inner ends of the valve stems 16 are forked to form pivotal connections witheccentric straps 2-0 mounted on oppositely positioned eccentrics 21 on a regulator stem 22 which passes through a sleeve 23 threaded in the valve casing 10, said regulator stem 22 being provided with a shoulder 24: to engage the sleeve 23 and prevent end play and also having its inner end seated in a bearing stud 25 within the valve casing.

There is a gland cap 26 threaded on the end of sleeve 23 to prevent leakage around the regulator stem and the projecting end of said regulator stem is provided with a handle 27 by means of which-it may be turned and an indicator finger 28 indicating the position of the valve on a marked dial 29 on the valve casing.

,One of the eccentric straps 20 is provided with a projecting lug 30to be engaged by an adjustable set screw 32 which is threaded through the wall of the valvecasing to limit the degree of opening of the valves and a screw plug 33 is threaded in the opening for the set screw 32. The usual discharge pipe 3a leads upwardly from the valve casing to convey the waterto the shower.

In operation both valves are tightly closed with their rubber gaskets 17 bearing firmly on the valve seats when the regulator handle 27 is in the position in which its indicator finger 28 stands in'front of the nr'dflet) Off on-thedial 29 When the regdiibr handle isturned from this position the eccentrics 21 force both of the valves to move outwardly, but by: reason of the different positions of the valve members 15 the cold water supply valve admits the cold water as soon as its rubberilfiasket 17 is moved off of the valve/seat w e the hot water supply casing,

valve does not admit the hot water until the rcccsscs of its valve member 15 are brt'iught into communication with the valve chamber by passing the valve seat, for the said valve members 15 have a comparatively close lit in the ends of the valve casing 10. It then follows that during the first portion of the movement of the regulator handle 27 cold water only is admitted to the valve casing in increasing volume and until the word Cold on the dial 29 is reached by the indicator finger 28.' A further movement of the regulator handle 27 reduces the inflow of cold. water by the approach of the unrecessed end of valve member 15 of the cold water supply valve to the end of the valve casing, while .the hot water is admitted through the recesses in the valve member 15 of the hot water supply valve and increases its volume of flow with the continuing movement of the regulator handle until the movement is stopped by the engagement of lug 30 with the adjusting screw 32, at which point a maximum flow of hot water is produced that will not be scalding in its effect. \Vhen the non-scald ing valve is installed the posit-ion for the adjusting screw 32 may be determined by test and in subsequent use the regulator handle may be thrown until stopped by the set screw without danger of admitting water at a scalding temperature. Cold water or water of any intermediate temperature may be caused to flow through the shower by the proper adjustment of the regulator handle.

Should the rubber gaskets 17 become worn so as to not properly close the valves against leakage when the throw of the eccentrics 21 is extreme, either or both of the supply valves may be tightened by adjusting the valve members 15 and the other valve parts on the valve stems 16 by turning them on the screw threads thereof, and the parts may be clamped in their new adjustment by tightening the cap nuts l9.

By reason of the double union elbow connections the device may be connected up with supply pipes from below or from above or from the back and in any connection it may be quickly and easily disconnected'for making repairs without disturbing the supply pipes for by uncoupling both unions the elbow connections may be removed to give access to the valves.

What I claim as my invention is- 1. A non-scalding valve, comprising a valve casing, hot and cold water supply valves controlling inlets thereto, a regulator handle having a stem mounted in the valve eccentrics carried by the stem, and eccentric straps surrounding the eccentrics and having pivotal connection with the valves.

2. A non-scalding valve, comprising a valve casing, hot and cold water supply stem, and eccentric straps surrounding eccentrics and connected with the valve-i.

said valves being adjustable with relation to the eccentrics.

3. A non-scalding valve, valve casing, hot and cold water supply valves controlling inlets thereto, a regulator handle having a stem rotatably mounted it: the valve easing, eccentrics carried by the stem, and eccentric straps surrounding tlr eccentrics and connected to the valves, said valves being threaded on their connections with the eccentric straps whereby they may be adjusted.

l. A non-scalding valve, comprising a valve casing having valve seats at its opposite ends, hot and cold water for said valve seats comprising recessed valve members slidably mounted within the valve seats and having rubber gaskets ior fitting on the valve seats, the recess in one ol the valve members extending to the inner comprising a supply valves end of the valve and the recess in the other i valve member being spaced from the inn end of the valve, and a regulator handle mounted on the valve casing and having operative and pivotal connection with sari.

valves.

5. A non-scalding vzilve, valve casing site ends, for said comprising :1 having valve seats at its op hot and cold water supply val valve seats and having rubber gaskets fitting on the valve seats, the recess in u of the valve members extending to the hint end of the valve and the recess in the otl r valve member being spaced from the inns-r end of the Valve, valve stems on which the valves are threaded, a regulator handle huh/ ing a stem mounted in the valve casing, centrics on the regulator stem, and cccen tric straps around the eccentrics having pivotal connection with the valve stems.

6. A non-scalding valve, comprising a valve casing having Valve seats at its opp-o site ends, hot and cold water supply valves for said valve seatscomprising recessed valve members slidably mounted within the valve seats and having rubber gaskets for fitting on the valve seats, the recess in one of the valve members extending to the inner l end of the valve and the recess in the other valve member being spaced from the inner end of the valve, valve stems on which the valves are threaded, and cap nuts for clamping the valve parts in their adjustn'ient on the valve stems, 'a regulator handle having a stem mounted in the valve casing, ccccn tries on the regulator stem, eccentric straps around the eccentrics having connection with the valve stems, a marked dial on the valve casing, and an indicator-finger carriedby; the reg'ulatorrhandleto show =-the .position of the valves on the dial.

F 7:. Afnon-s calding valve, comprising a -valve-casing, hot and cold-water supply alves cont-rolling'inle ts thereto, a regulator handle having a stem mounted in the valve cziflslng, eccentrics carried bythe stem, ec-

' centric straps surrounding 4 the eccentrics .and connected with thevalves, and an ad- -"']"u" s'ta ole set screw threaded 'in the cas'ingand' standing ine the path ofjone of the eccen to limit the movement thereof and tome etc to limit the temperature of the,

water. adm tted by the valves.

185A non-sealdingflvalve, comprising 'a e valveicasing, hotand cold water supply valves'controlling inlets thereto, a regulator [handle having a s'tem mounted in the valve (9.A non-scalding valve, comprising a Witnesses valve casing having valve's eatsat its opposite ends,' hotrand cold water supply valves '-for said valve seats coni'prising recessed valvemembers slidably mounted within the valve seats and having ifuhber gaskets for fitting on the valve seats, the recess in one of the valvevmembers extending to the inner end of the-valve and the'recess in the other valve meinber being spaced" from the inner end of the "valve, valve stems on which the.

:valves are threaded, cap nuts for clamping the valve parts in their adjustment on the valve stems, a. regulator handle having a stem mounted 1n the valve .casmg,'eccentr1cs on theregulator stem,- eccentric -.tstraps around the eccentrics having connection with the valve .stems, andgelbows having union vconnections with the ends of the valve casing and union connections for the service pipes.i1'

In testimony f FRED HOFFMANNQ s. o. oiwwm ALMA A. .KLUG.

whereof, I iifiix my signa+ ture', in presence of tWO W1t}18SS6S. i 

